NFBU200

The Yokogawa NFBU200-S05 is a long base module for the FCN (Field Control Node) control system. It provides the mounting structure and internal bus connections for CPU, power supply and I/O modules. This version is configured for 19-inch rack mounting and is specified as a basic type without explosion protection.

Function and System Configuration

The NFBU200 provides the physical slots and internal backplane connections required to assemble an FCN control unit. It accommodates CPU, power supply and I/O modules within one chassis, allowing the controller hardware to be arranged according to the required system configuration.

The long base module has 10 mounting slots. In a standard control-unit configuration, two slots are reserved for the CPU module, leaving capacity for up to eight additional I/O modules. Actual capacity depends on the CPU and redundancy configuration.

Mounting and Model Identification

The ordering code NFBU200-S05 identifies the following configuration:

• NFBU200: Long base module.
• S: Standard type.
• 0: 19-inch rack-mounted version.
• 5: Basic type without explosion protection.

The S05 configuration should not be confused with NFBU200-S15, which is the DIN rail-mounted version. The final digit also distinguishes the basic non-explosion-protected configuration from other available options.

Power Supply Arrangement

The NFBU200 provides two power supply module positions. The FCN-500 hardware documentation specifies that power supply redundancy is possible when using the NFPW444 power supply module.

The base module itself has a maximum self-consumption of 0.4 A at 5 V DC. This is the chassis self-consumption specification, not the total power requirement of the assembled controller.

Technical Specifications

Parameter	Specification
Model	NFBU200-S05
Brand	Yokogawa
Product Type	Long Base Module
System	STARDOM FCN
Mounting	19-inch rack-mounted
Number of Mounting Slots	10
Maximum Additional I/O Modules	8 (standard control unit configuration)
Power Supply Module Slots	2
Power Supply Redundancy	Supported with NFPW444
Internal Bus	SB bus
Maximum Self-Consumption	0.4 A at 5 V DC
24 V DC Self-Consumption	0
Dimensions (W x H x D)	482.6 x 132.5 x 40.5 mm
Weight	1.9 kg

Frequently Asked Questions

Q: How many I/O modules can the NFBU200-S05 accommodate?

A: The NFBU200 has 10 mounting slots, with two reserved for the CPU module in a standard control-unit configuration. This leaves capacity for up to eight additional I/O modules. CPU redundancy reduces the available I/O module capacity.

Q: Can the NFBU200-S05 support redundant power supplies?

A: Yes. The chassis provides two power supply positions. Redundant power supply operation requires compatible NFPW444 modules.

Q: What is the difference between NFBU200-S05 and NFBU200-S15?

A: Both are long base modules. The NFBU200-S05 is designed for 19-inch rack mounting, while the NFBU200-S15 is designed for DIN rail mounting. Their installation requirements and physical dimensions are different.

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